Jack



T. TOHKILSN.

JACK.

APPLICATION FILED sPL 2, 1920.

` 1,394,3755 Pat-@md @en Q W 2mm! 75H1. TOR/fu. D50/V UNITED STATESTORI.. TORKILDSON, OF LAKE CITY, SOUTH DAKOTA.

JACK.

Specification of Letters Patent.

Patented Oct. 18, 1921.

Application filed September 2, 1920. Serial No. 407,748.

To all whom t may concern.'

Be it known that I, Toni. TonKILDsoN, a citizen of the United States,residing at Lake City, in the county of Marshall and State of SouthDakota, have invented certain new and useful Improvements in Jacks; andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same. Y

The present invention relates to jacks, and more especially to suchdevices intended for automobiles and other vehicles, and aims to providea novel and improved jack for quickly and conveniently jacking up theaxle of the vehicle or the like.

It is an obj ect of the invention to provide a jack comprisingsubstantially horizontal rock shafts and means carried thereby andoperable for raising the vehicle or other ob` ject, in combination withmeans for turning one of said shafts to supply the power manually in aconvenient and simple manner.

A further object of the invention is the provision of such a deviceincluding a rotatable shaft for operating the jack, a hand lever, and aratchet device connecting said lever and shaft for applying the power.

A still further object is the provision of novel means for releasing theratchet device from the hand lever to enable the vehicle or other objectto be lowered conveniently.

With the foregoing and other objects in view, which will be apparent asthe description proceeds, the invention resides in the construction andarrangement of parts hereinafter described and claimed, it being.understood that changes can bey made within the scope of what isclaimed without departing from the spirit of the invention.

The invention is illustrated in the accompanying drawings, whereinFigure 1 is a perspective view of the improved jack, portions beingbroken away.

Fig. 2 is a side elevation thereof, portions beingfbroken away.

Fig. 3 is a fragmental detail view, on an enlarged scale, of the ratchetdevice.

Fig. 4, is a detail view showing the cam returning spring.

The frame or base 7 of the jack, as shown, is of triangular form, beingwide at its forward end and tapering to a Vnarrow rear end, and thisframe or base is rendered portable, so that it can be readily movedabout on the floor. Thus, the frame is supported at its forward cornerson casters 8, and at its rear end or corner on the caster 9.

The elevating or lifting means includes a transverse rock shaft 10journaled at its ends Vsaid bars are provided at their upper ends withforwardly extending seats 141 for the vehicle aXle or other obj ect. Inorder to pro` vide a parallelogram movement of the elevating or liftingmeans, a second rock shaft 15 is disposed above and parallel with theshaft 10, and its end portions are journaled in bearings 16 supported bybrackets 17 secured to the side members and forward `cross piece of theframe. The shaft 15 has forwardly extending arms 18 above the lowerforwardly projecting arms of the levers l2, and pivotally connected tothe upper ends of the hars 13, whereby said bars 13 are maintained invertical position, and providing a parallelogram movement. V

The actuating means includes a transverse shaft 19 journaled in bearings20 secured on the side members of the frame in rear of the shafts 10 andA15, and upwardlyextending arms 19 are secured to the ends of the shaft19 and are connected by links or lbars 21 with the upwardly-extendingarms of the levers 12 below the rock shaft 16. Thus, the shafts 19 and10 will rock or oscillate simultaneously while the rock shaft 15 willmaintain the parallel vertical mo-` tion of the lift bars 13.,

A ratchet wheel 22 is `secured in any suitable manner on the shaft 19withinthe frame and a hand lever` 23 of any suitable length has itslower end bifurcated to straddle said ratchet wheel, and provided withbearings 24 rotatable on the hub of the ratchet wheel so that said leverturns around said shaft 19. .a pressed pawl or dog 26y is carried bv the`lever 23 to engage the teeth of the ratchet wheel, and whereby to turnsaid ratchet wheel with the lever 23, when said lever is swungrearwardly and downwardly by the operator, and by pulling the links 21rearwardly with the arms 19', and thereby swing the levers 12 forraising the lift bars 13, in jacking up a vehicle or other object underA suitable spring-` which the frame has been moved, as will be readilyunderstood.

The reverse motion of the ratchet wheel 22 and lifting means isprevented by means of a pawl or dog 29 engaging the ratchet wheel andpivotally mounted on a cross piece 30 of the frame, thereby supporting'V Vleasing lever 31 is fulcrumed at one end to the cross piece andextends across the edge of the pawl 29, said lever 31 being of angularform so that its free end projects toward the shaft 19. This lever 31can be swung to contact with the pawl 29 and swingy Vsaid pawl away fromthe ratchet wheel,

thereby releasing the ratchet wheel for reverse rotation to enable thebars 13 to move downwardly. The lever 31 is operated from the handle 25of the lever 23, and, for this purpose, one bearing 24 of the lever 23has a sleeve.32 on the vshaft 19. on which a rotatable ring; 33 ismounted and a second ring 34 is also mounted .on said sleeve with Athering 33 between the ring 34 and bearing` 24, and the ring 34 isfeathered on the sleeve to slide longitudinallythereon butnot turn vwith respect to said sleeve. The adjacent confronting faces of the ringshave an annular series of cams 34 fitting one another, and the free endof the lever 31 contacts with the outer face of the ring 34. The ringhas an ear 35 connected by a link or rod 33 with a lever 37 carried bythe lever 23 adjacent to the handle 25, whereby the lever 37 can begrasped by the hand and swung toward the handle 25, for turning the ring33 on the sleeve 32, thereby moving the ring 34 by cam action away fromthe ratchet wheel 22, and swinging the lever 31 to disengage the pawl 29from the ratchet wheel. A coiled expansion spring 38 is confined betweenthe ring 34 and the corresponding bearing 20, and a retractile spring 39connects the arm or'ear 35 and an arm 40 on the ring 40 whereby to Vmovethe ring 34 towardV the ratchet wheel 22, and enable thev pawl 29 toagain engage the ratchet wheel 22, and to return the ring 32 to normalposition. lt is to be noted that the rings 33 and 34 being mounted onthe sleeve 32 will remain in proper operative position with respect tothe lever 23 'in the various positions of said lever, so that the pawl29 can be releasedin any position of the hand lever 23. rEhe pawl or dog26 is also preferably connected by alink or rod 27 with a lever 28pivoted to the hand lever 23 adjacent to the handle 25, whereby thelever 28 can be grasped by the hand for disengaging the pawl 26 from theratchet wheel when desired. Thus, both levers 28 and 37 can be graspedsimultaneously, to release both pawls or dogs at once, whereby thevehicle or object will gravitate and return the lifting means andratchet wheel to initial position. 4 Y

The bars or links 21 are also preferably bent, as shown, to pass overthe shaft. 19 to or near dead center position Vwhen they are moved totheir extreme rear positions, and thereby limit the movement and alsotake the strain ofi' ofthe ratchet wheel and. pawl 29.

Having thus described the invention, what is claimed as new is 1. A jackcomprising a pa-irV ofsubstantially horizontal rock shafts, one abovethe other, arms extending fromsaidfshafts, a

vertical lift bar pivotedv to said arms to be raised and lowered withsa-idarms by a parallelogram movement, and actuating means connected toone of said shafts for rocking same. Y

2. A jack comprising a pair of substantially horizontal rock shafts, oneabove the other, a crank lever carried by the lowerV shaft` having anarm extending upwardly and another arm extending at an angle with saidarm, an arm extending from the upper shaft above the second named arm ofthe lower shaft, a substantially vertical lift bar pivotally connectedto the second named arm of the lower shaft and the arm of the uppershaft to be raised and lowered with said arms, and-actuating meansloca-ted at one side of said shafts and connected to the first named armof the lower shaft.

3. A jack comprising a frame, a pair of rock shafts carried by the framein a'substantially horizontal position one above the other, bell cranklevers carried by the lower shaft having upwardly extending arms andother arms extending at an angle therewith,

rio

the upper shaft having arms extending therefrom above the second namedarms of the lower shaft, substantially vertical lift bars pivotallyconnectedto the second named arms of the lowersha'ft andthe arms-of theupper shaft to move upwardly and downwardly therewith, a third shaftmounted on the frame at one side of the aforesaid shafts, upwardlyextending arms carriedby ratchet Wheel, a second pawl to engage theratchet Wheel to prevent reverse rotation thereof, a lever arranged fordsengaging the second pawl from the ratchet Wheel, said hand leverhaving a sleeve on the shaft, a pair of coperating cam rings on saidsleeve, one to slide longitudinally on the sleeve and the other to turnfor sliding said slidable ring on the sleeve, the second named leverbeing arranged to be swung by said slidable ring for disengaging thesecond paWl from the ratchet Wheel, and means carried by the hand leverand connected to the second named ring for turning same.

5. A jack comprising lifting means, a ratchet Wheel operativelyconnected to said lifting means, a hand lever mounted to swing with andrelatively to said ratchet Wheel, va pawl carried by the hand lever toengage the ratchet Wheel, a second pavvl to engage the ratchet Wheel forpreventing reverse rotation thereof, and means arranged and operablefrom hand lever in any position of said lever for disengaging the pawlsfrom the ratchet Wheel.

6. A jack comprising lifting means, a paWl carried by said hand lever toengage the ratchet Wheel, a second pawl not carried by the hand lever toengage the ratchet Wheel for preventing reverse rotation there-A andrelatively to said ratchet Wheel, a paWlY carried by the hand lever toengage the ratchet Wheel, a second pawl to engage the ratchet Wheel andprevent reverse rotation thereof, a ring arranged to turn with saidlever and slidable relatively thereto, means carried by the hand leverfor sliding said ring in any position of said lever, means operated bythe sliding movement of said ring for disengaging the second paWl fromthe ratchet Wheel, and spring means :for returning said ring to initialposition.

In testimony whereof I have signed my name to this specication in thepresence of two subscribing Witnesses.

TORL TORKILDSGN.

